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        <p>记录一下filesystem相关知识，需要开启c++17标准。</p>
<h1 id="path相关操作"><a href="#path相关操作" class="headerlink" title="path相关操作"></a>path相关操作</h1><h2 id="目录操作"><a href="#目录操作" class="headerlink" title="目录操作"></a>目录操作</h2><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 获取绝对路径</span></span><br><span class="line">std::filesystem::<span class="built_in">absolute</span>(std::filesystem::<span class="built_in">current_path</span>().<span class="built_in">append</span>(filename_));</span><br><span class="line"><span class="comment">// 获得目录分割</span></span><br><span class="line">std::filesystem::path::preferred_separator;</span><br></pre></td></tr></table></figure>

<h2 id="遍历目录"><a href="#遍历目录" class="headerlink" title="遍历目录"></a>遍历目录</h2><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;fstream&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;iostream&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;filesystem&gt;</span></span></span><br><span class="line"><span class="keyword">namespace</span> fs = std::filesystem;</span><br><span class="line"> </span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span></span></span><br><span class="line"><span class="function"></span>&#123;</span><br><span class="line">    fs::<span class="built_in">create_directories</span>(<span class="string">&quot;sandbox/a/b&quot;</span>);</span><br><span class="line">    std::<span class="built_in">ofstream</span>(<span class="string">&quot;sandbox/file1.txt&quot;</span>);</span><br><span class="line">    std::<span class="built_in">ofstream</span>(<span class="string">&quot;sandbox/file2.txt&quot;</span>);</span><br><span class="line">    <span class="keyword">for</span>(<span class="keyword">auto</span>&amp; p: fs::<span class="built_in">directory_iterator</span>(<span class="string">&quot;sandbox&quot;</span>))</span><br><span class="line">        std::cout &lt;&lt; p.<span class="built_in">path</span>() &lt;&lt; <span class="string">&#x27;\n&#x27;</span>;</span><br><span class="line">    fs::<span class="built_in">remove_all</span>(<span class="string">&quot;sandbox&quot;</span>);</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">output:</span><br><span class="line"><span class="string">&quot;sandbox/a&quot;</span></span><br><span class="line"><span class="string">&quot;sandbox/file1.txt&quot;</span></span><br><span class="line"><span class="string">&quot;sandbox/file2.txt&quot;</span></span><br></pre></td></tr></table></figure>

<h2 id="获取文件名"><a href="#获取文件名" class="headerlink" title="获取文件名"></a>获取文件名</h2><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">auto</span> log_path = fs::<span class="built_in">absolute</span>(log_path_).<span class="built_in">string</span>();</span><br><span class="line"><span class="keyword">auto</span> logger_name = fs::<span class="built_in">path</span>(log_path).<span class="built_in">stem</span>().<span class="built_in">string</span>();</span><br></pre></td></tr></table></figure>

<h1 id="引用"><a href="#引用" class="headerlink" title="引用"></a>引用</h1><ul>
<li>[1]<a target="_blank" rel="noopener" href="https://en.cppreference.com/w/cpp/filesystem">Filesystem library</a></li>
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